<template>
  <div>
    <div v-clickoutside="hideReplyBtn" @click="inputFocus" class="my-reply">
      <el-avatar class="header-img" :size="40" :src="myHeader"></el-avatar>
      <div class="reply-info">
        <div
          tabindex="0"
          contenteditable="true"
          id="replyInput"
          spellcheck="false"
          placeholder="输入评论..."
          class="reply-input"
          @focus="showReplyBtn"
          @input="onDivInput($event)"
        ></div>
      </div>
      <div class="reply-btn-box" v-show="btnShow">
        <el-button
          class="reply-btn"
          size="medium"
          @click="sendComment"
          type="primary"
          >发表评论</el-button
        >
      </div>
    </div>
    <div
      v-for="(item, i) in comments"
      :key="i"
      class="author-title reply-father"
    >
      <el-avatar class="header-img" :size="40" :src="item.headImg"></el-avatar>
      <div class="author-info">
        <span class="author-name">{{ item.name }}</span>
        <span class="author-time">{{ item.time }}</span>
      </div>
      <div class="icon-btn">
        <span @click="showReplyInput(i, item.name, item.id)"
          ><i class="iconfont el-icon-s-comment"></i>{{ item.commentNum }}</span
        >
        <i class="iconfont el-icon-caret-top"></i>{{ item.like }}
      </div>
      <div class="talk-box">
        <p>
          <span class="reply">{{ item.comment }}</span>
        </p>
      </div>
      <div class="reply-box">
        <div v-for="(reply, j) in item.reply" :key="j" class="author-title">
          <el-avatar
            class="header-img"
            :size="40"
            :src="reply.fromHeadImg"
          ></el-avatar>
          <div class="author-info">
            <span class="author-name">{{ reply.from }}</span>
            <span class="author-time">{{ reply.time }}</span>
          </div>
          <div class="icon-btn">
            <span @click="showReplyInput(i, reply.from, reply.id)"
              ><i class="iconfont el-icon-s-comment"></i
              >{{ reply.commentNum }}</span
            >
            <i class="iconfont el-icon-caret-top"></i>{{ reply.like }}
          </div>
          <div class="talk-box">
            <p>
              <span>回复 {{ reply.to }}:</span>
              <span class="reply">{{ reply.comment }}</span>
            </p>
          </div>
          <div class="reply-box"></div>
        </div>
      </div>
      <div v-show="_inputShow(i)" class="my-reply my-comment-reply">
        <el-avatar class="header-img" :size="40" :src="myHeader"></el-avatar>
        <div class="reply-info">
          <div
            tabindex="0"
            contenteditable="true"
            spellcheck="false"
            placeholder="输入评论..."
            @input="onDivInput($event)"
            class="reply-input reply-comment-input"
          ></div>
        </div>
        <div class="reply-btn-box">
          <el-button
            class="reply-btn"
            size="medium"
            @click="sendCommentReply(i, j)"
            type="primary"
            >发表评论</el-button
          >
        </div>
      </div>
    </div>
  </div>
</template>

<script>
const clickoutside = {
  // 初始化指令
  bind(el, binding, vnode) {
    function documentHandler(e) {
      // 这里判断点击的元素是否是本身，是本身，则返回
      if (el.contains(e.target)) {
        return false;
      }
      // 判断指令中是否绑定了函数
      if (binding.expression) {
        // 如果绑定了函数 则调用那个函数，此处binding.value就是handleClose方法
        binding.value(e);
      }
    }
    // 给当前元素绑定个私有变量，方便在unbind中可以解除事件监听
    el.vueClickOutside = documentHandler;
    document.addEventListener('click', documentHandler);
  },
  update() {},
  unbind(el, binding) {
    // 解除事件监听
    document.removeEventListener('click', el.vueClickOutside);
    delete el.vueClickOutside;
  },
};
export default {
  name: 'ArticleComment',
  data() {
    return {
      btnShow: false,
      index: '0',
      replyComment: '',
      myName: 'Lana Del Rey',
      myHeader:
        'https://ae01.alicdn.com/kf/Hd60a3f7c06fd47ae85624badd32ce54dv.jpg',
      myId: 19870621,
      to: '',
      toId: -1,
      comments: [
        {
          name: 'Lana Del Rey',
          id: 19870621,
          headImg:
            'https://ae01.alicdn.com/kf/Hd60a3f7c06fd47ae85624badd32ce54dv.jpg',
          comment: '我发布一张新专辑Norman Fucking Rockwell,大家快来听啊',
          time: '2019年9月16日 18:43',
          commentNum: 2,
          like: 15,
          inputShow: false,
          reply: [
            {
              from: 'Taylor Swift',
              fromId: 19891221,
              fromHeadImg:
                'https://ae01.alicdn.com/kf/H94c78935ffa64e7e977544d19ecebf06L.jpg',
              to: 'Lana Del Rey',
              toId: 19870621,
              comment: '我很喜欢你的新专辑！！',
              time: '2019年9月16日 18:43',
              commentNum: 1,
              like: 15,
              inputShow: false,
            },
            {
              from: 'Ariana Grande',
              fromId: 1123,
              fromHeadImg:
                'https://ae01.alicdn.com/kf/Hf6c0b4a7428b4edf866a9fbab75568e6U.jpg',
              to: 'Lana Del Rey',
              toId: 19870621,
              comment: '别忘记宣传我们的合作单曲啊',
              time: '2019年9月16日 18:43',
              commentNum: 0,
              like: 5,
              inputShow: false,
            },
          ],
        },
        {
          name: 'Taylor Swift',
          id: 19891221,
          headImg:
            'https://ae01.alicdn.com/kf/H94c78935ffa64e7e977544d19ecebf06L.jpg',
          comment: '我发行了我的新专辑Lover',
          time: '2019年9月16日 18:43',
          commentNum: 1,
          like: 5,
          inputShow: false,
          reply: [
            {
              from: 'Lana Del Rey',
              fromId: 19870621,
              fromHeadImg:
                'https://ae01.alicdn.com/kf/Hd60a3f7c06fd47ae85624badd32ce54dv.jpg',
              to: 'Taylor Swift',
              toId: 19891221,
              comment: '新专辑和speak now 一样棒！',
              time: '2019年9月16日 18:43',
              commentNum: 25,
              like: 5,
              inputShow: false,
            },
          ],
        },
        {
          name: 'Norman Fucking Rockwell',
          id: 20190830,
          headImg:
            'https://ae01.alicdn.com/kf/Hdd856ae4c81545d2b51fa0c209f7aa28Z.jpg',
          comment: 'Plz buy Norman Fucking Rockwell on everywhere',
          time: '2019年9月16日 18:43',
          commentNum: 0,
          like: 5,
          inputShow: false,
          reply: [],
        },
      ],
    };
  },
  directives: { clickoutside },
  methods: {
    inputFocus() {
      var replyInput = document.getElementById('replyInput');
      replyInput.style.padding = '8px 8px';
      replyInput.style.border = '2px solid blue';
      replyInput.focus();
    },
    showReplyBtn() {
      this.btnShow = true;
    },
    hideReplyBtn() {
      this.btnShow = false;
      replyInput.style.padding = '10px';
      replyInput.style.border = 'none';
    },
    showReplyInput(i, name, id) {
      this.comments[this.index].inputShow = false;
      this.index = i;
      this.comments[i].inputShow = true;
      this.to = name;
      this.toId = id;
    },
    _inputShow(i) {
      return this.comments[i].inputShow;
    },
    sendComment() {
      if (!this.replyComment) {
        this.$message({
          showClose: true,
          type: 'warning',
          message: '评论不能为空',
        });
      } else {
        let a = {};
        let input = document.getElementById('replyInput');
        let timeNow = new Date().getTime();
        let time = this.dateStr(timeNow);
        a.name = this.myName;
        a.comment = this.replyComment;
        a.headImg = this.myHeader;
        a.time = time;
        a.commentNum = 0;
        a.like = 0;
        this.comments.push(a);
        this.replyComment = '';
        input.innerHTML = '';
      }
    },
    sendCommentReply(i, j) {
      if (!this.replyComment) {
        this.$message({
          showClose: true,
          type: 'warning',
          message: '评论不能为空',
        });
      } else {
        let a = {};
        let timeNow = new Date().getTime();
        let time = this.dateStr(timeNow);
        a.from = this.myName;
        a.to = this.to;
        a.fromHeadImg = this.myHeader;
        a.comment = this.replyComment;
        a.time = time;
        a.commentNum = 0;
        a.like = 0;
        this.comments[i].reply.push(a);
        this.replyComment = '';
        document.getElementsByClassName('reply-comment-input')[i].innerHTML =
          '';
      }
    },
    onDivInput: function (e) {
      this.replyComment = e.target.innerHTML;
    },
    dateStr(date) {
      //获取js 时间戳
      var time = new Date().getTime();
      //去掉 js 时间戳后三位，与php 时间戳保持一致
      time = parseInt((time - date) / 1000);
      //存储转换值
      var s;
      if (time < 60 * 10) {
        //十分钟内
        return '刚刚';
      } else if (time < 60 * 60 && time >= 60 * 10) {
        //超过十分钟少于1小时
        s = Math.floor(time / 60);
        return s + '分钟前';
      } else if (time < 60 * 60 * 24 && time >= 60 * 60) {
        //超过1小时少于24小时
        s = Math.floor(time / 60 / 60);
        return s + '小时前';
      } else if (time < 60 * 60 * 24 * 30 && time >= 60 * 60 * 24) {
        //超过1天少于30天内
        s = Math.floor(time / 60 / 60 / 24);
        return s + '天前';
      } else {
        //超过30天ddd
        var date = new Date(parseInt(date));
        return (
          date.getFullYear() +
          '/' +
          (date.getMonth() + 1) +
          '/' +
          date.getDate()
        );
      }
    },
  },
};
</script>

<style lang="scss" scoped>
.my-reply {
  padding: 10px;
  background-color: #fafbfc;
  .header-img {
    display: inline-block;
    vertical-align: top;
  }
  .reply-info {
    display: inline-block;
    margin-left: 5px;
    width: 90%;
    @media screen and (max-width: 1200px) {
      width: 80%;
    }
    .reply-input {
      min-height: 20px;
      line-height: 22px;
      padding: 10px 10px;
      color: #ccc;
      background-color: #fff;
      border-radius: 5px;
      &:empty:before {
        content: attr(placeholder);
      }

      &:focus:before {
        content: none;
      }

      &:focus {
        padding: 8px 8px;
        border: 2px solid blue;
        box-shadow: none;
        outline: none;
      }
    }
  }

  .reply-btn-box {
    height: 25px;
    margin: 10px 0;
    .reply-btn {
      position: relative;
      float: right;
      margin-right: 15px;
    }
  }
}

.my-comment-reply {
  margin-left: 50px;
  .reply-input {
    width: flex;
  }
}

.author-title:not(:last-child) {
  border-bottom: 1px solid rgba(178, 186, 194, 0.3);
}

.author-title {
  padding: 10px;
  .header-img {
    display: inline-block;
    vertical-align: top;
  }

  .author-info {
    display: inline-block;
    margin-left: 5px;
    width: 60%;
    height: 40px;
    line-height: 20px;
    > span {
      display: block;
      cursor: pointer;
      overflow: hidden;
      white-space: nowrap;
      text-overflow: ellipsis;
    }

    .author-name {
      color: #000;
      font-size: 18px;
      font-weight: bold;
    }

    .author-time {
      font-size: 14px;
    }
  }

  .icon-btn {
    width: 30%;
    padding: 0 !important;
    float: right;
    @media screen and (max-width: 1200px) {
      width: 20%;
      padding: 7px;
    }
    > span {
      cursor: pointer;
    }

    .iconfont {
      margin: 0 5px;
    }
  }

  .talk-box {
    margin: 0 50px;
    > p {
      margin: 0;
    }

    .reply {
      font-size: 16px;
      color: #000;
    }
  }

  .reply-box {
    margin: 10px 0 0 50px;
    background-color: #f4f5f5;
  }
}
</style>
